Door



June 1933' D. OLIVER ET AL 1,913,235

DOOR Filed Nov. 5, 19:50 2 Sheets-Sheet 1 i Patented June 6, 1933 UN-"ED STATES PATENT DA ID OLIVER, OFJBERLIN; AND MAX roxonivy, or mm eaexsmm, ennmrfiv l J Applicati on ,filed November 1930, Serial No. 493,596, and in Germany November 9,; 1929. i

The inventionrelatesl to doors,which are intended for use in places Where sloping floors are unavoidable, and particularly in theatres, concert halls, lecture halls and the 5 llkfltlld, also for ramps leading for example,

tofmotor-ea'r garages with several stories, as

vvellasg for any other purposes Where the flooring'in frontof thedoor is on a slope. Hitherto, there have been no known doors providing a satisfactory closurein' thecase of sloping surfaces of this kind. i It is i1n"- possible merely to cut the door obliquely, to correspond with the slope of the "floor, he 1 cause, in such case it cannot be opened; but

; oral practice has been to provide a remedy by levelling that portionot the floor Which is in front of the door, andjsloping it only between doors. This, of course,is only a makeshift,

sinceuniformity inthe gradient of floorsis desirable. i w A According to the present invention, the flooring in theatres or the like can be kept of uniform gradient, and in spite of this, to proadapted to tilt at the end next the hinge of thedoor, and to I rise or drop when the door opens encloses; It the floor hasadovvnward slope,avvay from thediinge of the door, the treeend of the lclosure member Will occupy its lowest position when the door is shut, and i is graduallyraised as the door opens.* When thefdooris'fopen at right angles, the lower edge oftheclosure member 'ishorizontal, and as the door opens Wider, the free endof said nember'is lifted still more, so that it lies on higher level thanthe pivotal point.' If the floor slopes upwards fromthe hinge of the door, the free end of the closure member is on a higher level than the pivotal point, when 5 angle of 90, the closure memberis lowered into the horizontal position. Onthedoor being opened Wider, the closure member descends still further, so that the free end is on a lower level than the pivotal point. i In the jamstightlyat once. Consequently the gcn thedoor is shut." As the door opens to an simplest embodiment of the door, the closure member is fitted to enly one face ofthe door, The raising is effected bythethrust of the flooring in the act of opening and shuttinjg the door. In order t im rove the construction and aspect ofthedoor, the closure member can be mounted so as to fitover both faces of the doorftlius; being of channel cross sec,

tion, or it may alsoherecessed in the door. 11

In ordento reduce friction, the bottom oif the closure member mayi'befittedj with non; ers, balls, or the like, or other anti-friction devices. Finally, a cord and pulley device can be provided, so as to-actonthe free end of the member. The cord is led, for example, 1

toa point in thehinge of the door, that is higher than the outer point of application,

andthen secured to the frame,'so that it ens tains a pull when the door is opening, and

thus lifts the closure member; This ar 1 rangement is suitable for doors Where the flooring slopes downwardsfrom the hinge ofthedoor. i If the door is intended to; be opened in the opposite direction, a guide roam Which-1 the cord isatt-ached, isprovided on thefreeend of the door. The cordispassed round a pulley and led upwards to thehinge of the door. The rod, and therefore'also the clog sure member descends thefurther the wider the door is opened. In this manner the closure member can be caused to slide in, close 7 proximity to the floor without touching it; i In ,order more clearly tonnderstandv the invention reference is made to the accom i panyingdrawings which illustrate one em bodiment ota double doorin accordance with theinvention and in which Fig. 1 is an elevation of the do closed position; v

F ig. 2 is an elevation of the left-hand leaf open; 1 i I y i e, i Fig. 3 is an elevation of the right-hand leafopen, v Fig. 4: is a plan of the left-hand leaf open Fig. 5 and F ig. 6 is a sectionthrough, the closure member along the line A'B of Fig. 1,, f i

or, ma

Thedoorcmisists of the leaves apand i a plan of the right-hand leaf open e the axis Y. The floor 0 slopes downwards from left to right, so that the leaf a swings on an upper axis, and leaf 6 on a lower axis. The leaf a is provided with a closure member d, and the leaf 1) with a closure member 6, which are connected with the leaves a and b by means of joints. A cord f is attached to the freeend ofthedeaf a and, after'being led round a point g is fastened at h'('Figs. 1 and 4). During the opening of the leaf a, the pointy-naturally moves away from the point h, and since the cord is fastened at h it is pulled through the door, for a certain distance w, the closure member (i being lifted to a corresponding extent (at, Fig. '1"). The relative dimensions are so calculated that during the opening of the :door, the closure member d is lifted throughout to such an extent that itsjloweredge slides close above the floor all the time. When the ,leafa is ,wide open, so that it ,bears against the chamfered wa'lli or the stop 7r; ,(Fig. 4), the cord f will have raised the closure member all sofar that the freeend of the memberd isiona higher level than the end next the hingezofthe door, and the 'lower edge of the .closure member slopes upwards from the hinge.

The leaf -'b of the door is fitted .witha well, adapted to move vertically in a sleeve t. The rod l is acted upon lbya spring .m, theother end of which is attached .inside the sleeve. Under the pull of the spring .m, the rod Z carries the closure member a by 'means of a ring 11), adapted to move in a slot in the sleeve, and of a cord 0 attached to thering n and passed rounda ,pulley r (mounted on the door) to a point? on the angle side of the door, where it :is attached tozthe door frameat When the door is opened, the

cord 0 is drawn through the distance 00,

thereby pulling down the ring a for the same distance, and applying tension to the springzm. The rod Z,:and with it theclosure member' e is"lo we redaccordingly. The relative dimensions are inthiscase also calcu-' lated so that the closure member slidesclosely above the floor all the time the :door is be ngopened. 'flYhen the door .is wide open, so that it makes contact with the wall 2' or stop 8 (Fig. 51) the closure member 6 reaches its lowest position. The ring 1?, has approached the pulley 1 to the fullest extent. The lower edge of the closure member 0 now slopes downwards from the hinge of the door. i v

Rollers, balls or other antifriction devices are preferably provided on the under side of'the closure member, the rollers coming into action in the event of the cord being broken ithrough any cause. r

Bottom closure members, for doors, which are adapted to be raised and lowered, or-a-lso swung, are .known in .themselves. These .010- sure members however, are intended to cover the ,gap, often met with between the door :in theatres or similar structures, ;a closure member fitted at the lower edge of the door .and pivoted at the end next the hinge of the door, means for raising and lowering that closure member for predetermined amounts inaccordance withthe slope of the floor-and with theangle at which the door is opened.

2. In a door for ramp-like sloping floors in theatres or similar structures, a closure member fitted at the lower edgeof the door and pivoted at the 'end next the hinge of the door, a cordone end of which is attached to the free end of the closure member, the other end of which is hinged to the door and thence to the door frame for raising and lowering that closure :member for predetermined amounts of the opening or closing of the door in accordance with the slope of .the floor.

3. Ina door for ramp-like sloping floors in theatres or similar structures, a closure member of channel cross section, surroundingboth facesof the door,.fitted at'the lower edge of the doorand pivoted at theend next the hinge of the door, means for raising and lowering that closure member for a predetermined amount in accordance with ,the slope of thefloorandwiththe angleat which the .door is opened.

4. Ina door for ramp-like sloping floors in .theatres or similar structures, a closure member fitted at the lower edge of .the door and pivoted at the end next the hinge of the door, .a rod guided in a sleeve and suspended froma spring .for carrying that closure member, a cord one end of which is engaging with the upper end of the rod, the other .end of which is hinged to the door and thencetto thedoor frame for raisingand lowering that closure member .for predetermined amountsof the opening or closingoif the door in accordance with .the slope of the .floor. 7 r

5. A door for ramp-like sloping floorsas set forth in-claim 1, in which antifrictional devices are provided on the under side of the closure member.

6. A .door for ramp-like sloping floors as set forth in claim 1, in which rollers are provided on the under side of the closure member.

In witness whereof we have hereunto set our hands. 7

DAVID OLIVER. MAX POKQRNY. 

